The open source virtualization platform KVM has been included in the Linux kernel since version 2.6.20, in February 2007, and slowly made its way into many popular Linux distributions, including Knoppix, Ubuntu, Red Hat Enterprise Linux (RHEL) and Fedora, and very soon Novell SUSE Enterprise Linux Server (SLES).
Despite that, smaller ISVs have been shy so far to build on top of KVM and offer low cost virtual infrastructures that could rival with the only significant player in this space at the moment: Red Hat.
Things may be changing in the near future: now that Red Hat is investing in promoting its RHEV virtual infrastructure and there’s a growing awareness around KVM, new platforms may start to appear.
The first example is KaOS, a lightweight, open source KVM-based virtual machine monitor developed by Carbon Mountain.








